From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B671414831F; Tue, 30 Jul 2024 16:49:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722358148; cv=none; b=SuIzzSxGXa/feM0h5feSxe4bAGXG/g0P7NbU5S1iUvfg133gO4IY7u4DLfg5WJ/ZTqZQmSrhD6wHkR966qghlUF1oU4RkAL/+c01z0DNrA7pOt89eZ6Rcl5JcOROoh7MyS2ST4jUDiQoyIAX51ypzUkgAiA41lWUctM3v0wtDS8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722358148; c=relaxed/simple; bh=ckpGHQgGWdNh9Ki3ZhnPffGQspcrojaXSjfQgazC2qo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=m/wAKkMVmsa9VnvdbU8TkKpaWCFTOcHfH8R6rlNRpbKZzMyW9luzMv6ebGOW/Lfv6MEF7uA6x9aMVbEkuSYRzdL9QjSC+Ics1w3QTfbT8T5bgMlAy5dh6WURoAdjfOiEb+2pjgkzWFMo7l/a199huaaHd2TwVBh3vPMVLh+3T68= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0IdVQ3oH; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0IdVQ3oH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E1FCC32782; Tue, 30 Jul 2024 16:49:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1722358148; bh=ckpGHQgGWdNh9Ki3ZhnPffGQspcrojaXSjfQgazC2qo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0IdVQ3oHZsW+c+g7s0Gl0MeQjIsNAFcfT0EoFl6bsqo5HGf8zCYAxIO7UhpGRGkGC H3rMCLu3MsRx+n+Z3fPj/W2iGCAuv4sM+/fambSswW7De26ckD7rM40iZCiHpmMmkc 6PWOfaKYc0O1+jKCtJmmZR9/di3yTzw4WFZiWBVQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, CK Hu , AngeloGioacchino Del Regno , Hsiao Chien Sung , Chun-Kuang Hu , Sasha Levin Subject: [PATCH 6.10 329/809] drm/mediatek: Turn off the layers with zero width or height Date: Tue, 30 Jul 2024 17:43:25 +0200 Message-ID: <20240730151737.611970930@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240730151724.637682316@linuxfoundation.org> References: <20240730151724.637682316@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hsiao Chien Sung [ Upstream commit 6b9946f4550d8dad8bc1af2db97286ca449af786 ] We found that IGT (Intel GPU Tool) will try to commit layers with zero width or height and lead to undefined behaviors in hardware. Disable the layers in such a situation. Fixes: 453c3364632a ("drm/mediatek: Add ovl_adaptor support for MT8195") Fixes: d886c0009bd0 ("drm/mediatek: Add ETHDR support for MT8195") Reviewed-by: CK Hu Reviewed-by: AngeloGioacchino Del Regno Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.") Signed-off-by: Hsiao Chien Sung Link: https://patchwork.kernel.org/project/dri-devel/patch/20240620-igt-v3-6-a9d62d2e2c7e@mediatek.com/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Sasha Levin --- drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 2 +- drivers/gpu/drm/mediatek/mtk_ethdr.c | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c index 02dd7dcdfedb2..2b62d64759181 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c @@ -158,7 +158,7 @@ void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int idx, merge = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MERGE0 + idx]; ethdr = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]; - if (!pending->enable) { + if (!pending->enable || !pending->width || !pending->height) { mtk_merge_stop_cmdq(merge, cmdq_pkt); mtk_mdp_rdma_stop(rdma_l, cmdq_pkt); mtk_mdp_rdma_stop(rdma_r, cmdq_pkt); diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c b/drivers/gpu/drm/mediatek/mtk_ethdr.c index 5c52e514ae301..bf5826b7e7760 100644 --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c @@ -160,7 +160,12 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx, if (idx >= 4) return; - if (!pending->enable) { + if (!pending->enable || !pending->width || !pending->height) { + /* + * instead of disabling layer with MIX_SRC_CON directly + * set the size to 0 to avoid screen shift due to mixer + * mode switch (hardware behavior) + */ mtk_ddp_write(cmdq_pkt, 0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(idx)); return; } -- 2.43.0